Pennsylvania Gov. Tom Corbett said Sunday he’s not concerned about polling in his race for reelection that shows him trailing his Democratic opponents.

“We haven’t gotten our message out,” the Republican told POLITICO in an interview. “We’re starting to get our message out now. … I have a good record to run on: improving the economy of Pennsylvania, keeping the promise of less taxes, more jobs.”

Corbett, in Washington for the National Governors Association meeting over the weekend, is generally viewed as one of the most vulnerable GOP governors up for reelection this year. Polls put Corbett’s approval ratings in the 30s or even the 20s, and he trails most of the Democratic candidates in head-to-head matchups.

Corbett he said his Democratic opponents — eight are battling it out in a primary — haven’t impressed him.

“I haven’t heard them distinguish themselves as to where they differ from each other. I know they think they can do the job better than me, fine. But what are [they] going to do?”

Corbett added that he has a history of beating the odds in elections and shouldn’t be counted out.

“Keep in mind: Every race I’ve run I wasn’t supposed to win,” he said. “Every race I’ve run, I won.”

“I feel very good about the campaign, I think it’s going very well,” he continued. “I think when we get to November, I’ll be sitting here [at the NGA] again next year,” he said.

Still, Corbett acknowledged that being governor is “the hardest job [he’s] ever been in” and that it’s impossible to please everyone.

“You’re not going to get 100 percent agreement with what a governor does,” he said. “As governor, there are philosophical differences.”

He made that point in his campaign’s first ad last week, featuring Corbett speaking to voters about what he’s done in office: “The people of Pennsylvania sent me to Harrisburg not to make friends, but to make a difference.” The incumbent plans to raise $30 million for his reelection bid.

The Keystone State incumbent also defended his friend in the next state over, New Jersey Gov. Chris Christie. Corbett said he’d be happy to have Christie hit the campaign trail with him this fall.

“Chris could come right across the river,” he said, adding that Christie would be helpful to him in the vote-rich southeastern Pennsylvania suburbs.

Corbett said he texts Christie frequently, telling him to “hang in there” and asking how he’s handling the traffic scandal that’s dogged the Garden State governor this year.

“He’s sorely disappointed and hurt that these people made these very stupid errors in judgment and then didn’t admit to it,” Corbett said.

Corbett also said he doesn’t think having President Barack Obama come to the state to campaign would be helpful to any of his Democratic opponents.